In the last 5-6 years, I have been starting to encounter the use of the Micrоchip digital signal processors of the 33 series.Replaced Motorola processors in 3phases inverters, induction cookers, and more. The unpleasant thing is that they are locked up, we can not replace them and rewrite them, and we're forced to throw out appliances that have more life.I think it makes sense again to pay attention to the PIC processors.